this is bbc news. the headlines: around 1500 people have been detained in brazil after sunday's violent attacks on government buildings by a far—right mob. pro—democracy rallies have taken place across the country in response. thousands have taken to the streets of the largest city, sao paulo, demanding punishment for those responsible. the first orbital space mission launched from western europe has ended in failure after its rocket was unable to reach low—earth orbit. launcherone was released from under the wing of a reconditioned jumbo jet that had taken off from south—west england. in his latest tv interviews, prince harry has made further claims about the royal family. they include criticisms of his stepmother camilla, the queen consort. so far, there has been

no official response from buckingham palace or kensington palace. now on bbc news, it s time for click. as cop27 winds up in egypt, this week we'll look at some of the latest tech that is trying to clean up our planet. we'll muster up a mass of moss that's mopping up the mess in the air. that's easy for you to say! we will find out if hydrogen can do the heavy lifting. and check out our latest merch. if you don't like the band, don't worry, the logo comes back off.

once again, the leaders of the world have been coming together in an effort to fight climate change. as cop27 comes to a close, campaigners are warning that key commitments aimed at securing the future of the planet are at risk. in the year since cop26 happened here in glasgow, there has been a lot of criticism that the event was all talk and not much action. change is not going to come from inside there, that is not leadership. this is leadership. these un climate summits bring together thousands of delegates from governments, science and pressure groups from around the world. the aim is to provide the support for all countries to be able to reduce their carbon emissions and deal with any issues that climate change will inevitably cause. the world is warming because of emissions produced by burning fossilfuels,

like oil, gas and coal. yet global temperatures are heading towards 1.5 celsius above pre—industrial levels, and if they go to 1.8 celsius, scientists warn that half the world's population could be exposed to life—threatening heat and humidity. climate scientists have warned that change needs to come from the top, from governments and companies. but science and innovation will play an important part. so, this week, we're going to look at some of the latest green ideas. and first off, take a deep breath. deep inhalation and exhale. if you live in the green, it's easy to forget what life is like in the grey. the air literally can smell sweeter, and it's definitely cleaner. the world health organization says air pollution poses a major threat to health and climate, and it kills an estimated seven million people worldwide every year.

now, we're not all going to move back to nature — but what if we could bring nature into the cities? just outside berlin, this company is trying to freshen up our urban air. this is a biofilter which is sucking air in through the bottom and pumping it back out through this wall of moss. to illustrate that, we've got a smoke machine from the local discotheque. and if i just show you... there you go. it's going in through the bottom and out through the moss. and what happens to the air as it comes back out through the moss is where the magic happens. moss eats pollution. it sticks to its tiny leaves. it's absorbed, digested, and then is turned into more moss. so, as fans draw dirty air in, the bad stuff is left on the moss�* leaves, leaving cleaner air to flow back out. the idea of using moss�* natural

filtering properties came to the founder after he went for a jog. so, i was in shanghai and i did a lot of exercise outdoors to get back in shape, so go out for runs. and after i think two or three months, i started to have difficulties breathing and that's when i thought maybe i caught the flu, maybe i caught the cold, and it kept on lasting until the point i really left china, left shanghai and went went back to germany. and only after i came back, i realised, "hey, there's definitely a connection to the air quality in china and my personal health." that's when it clicked and i realised i have to do something about the air quality in cities. for the past eight years, green city solutions have been growing moss up to 15 times faster than in nature. each moss mat takes just under 12 weeks to grow. and i have to say, there's something very soothing about being in their greenhouse.

do you just come in here and stroke the moss? when i'm stressed. cool about moss is that this plant doesn't have roots, so they can capture all nutrients through the walls, leaves or leaves�* surface. so, you can imagine, like the normal plants, it takes the nutrients from the earth, but it's moss. it can capture everything. the second thing is, like, every plant, moss can absorb c02 because it needs for photosynthesis, for the energy. but the benefit is the density of the moss is pretty high, so we need this higher leaf—surface ratio to capture as much as possible. so, now we are going to take a sample. you? i can do it? for sure. let's tweeze some moss. got some. perfect. now we can have a look under the microscope. there we go. and it's in the lab where we'll

get to see moss�*s super power. the plant acts a lot like a human lung, whose high surface area can absorb a lot of the air in one go. and just like the lungs of a smoker, which end up getting blackened by tar, moss could act like the lungs of a city, eventually being covered in the stuff that we don't want to breathe. so, this is from our one active products. and the black — the black bits are the... exactly. this is the fine dust or particles from polluted air. and these are the green cells. and it means that the moss is still healthy because it's green. but they are pretty powerful. really good. moss fan. well, yeah — i am, somehow! as well as pulling pollutants out of the air, there's another advantage to these biofilters, too. here's a piece of moss and here's a thermal—imaging camera, and you can see

the temperature is about room temperature. but, look, when i point this at the air that's coming out of the moss, when you switch the ventilation on, look how much cooler it is. so, not only does this clean the air, it cools it too. and of course, pulling pollutants out of the atmosphere could help cool more than just your local surroundings. air pollution and climate change are also directly related. we have pollutants in air pollution — for instance, black carbon, which speed up the heating of the planet. and by binding those pollutants, we also help to decelerate climate change. you'll already see these biofilters in several cities around the world, although you might not have realised that you're sitting in front of a load of moss. and to make sure the moss is as effective and long—lived as possible, the health of each moss mat can be monitored from hq. an algorithm can control the irrigation, depending on the individual conditions.

so, in the future, i would envision that many buildings and the facades of the buildings would be covered in our solutions and, of course, you could also have motorways — large stretches. you could also use our moss filters to clean and cool the air and maybe even protect it from noise. moss on its own won't solve the climate crisis, but in amongst the talk of inventing greener technologies, it may be worth taking a lead from something that's been right under our feet the whole time. after all, nature has been regulating the environment much longer than we've been disrupting it. moss — who'd have thought it could be so useful? the lungs of a city! nature's natural filter. now, as companies try to reduce their carbon footprint and their impact on the climate, there are lots of different things that they could try. you could change your manufacturing process, how you transport goods or even move factories, but all of these are big things

to do, so you really need to know which is going to work best. how do you do it? answer — get yourself a digitaltwin! you make a virtual copy of your entire business and try stuff out in that first. alasdair keane's been to see the makers of dettol, who are trying to assess whether they can make their new products more sustainable or not. we use these kinds of products every day, from cleaning tabletops to personal hygiene and health. these brands are made by one company, called reckitt, and the industry to get them from factories to our homes is fast—moving and comes with a big impact on the planet. not huge, but important that we look at that carbon footprint and think how are we going to reduce it, decarbonise it? the product carbon footprint — that's everything from the raw materials all the way through to people using products — has to come down by 50% by 2030. that's going to take

longer process. that's where we have to think not just about our factories, but the ingredients that we use, the packaging that we use. to work out how they can meet targets, the company is turning to a digital replica of everything they do through a programme called risilience. so, this is it. this is the digital twin. this is risilience. this is risilience�*s version of different companies. we map them as a digital twin. we're looking at the data from a pretend company but the programme is bringing together lots of information, such as the miles that individual ingredients are shipped or how much energy each factory uses. it then runs lots of scenarios over the company to see how sustainable it is now and in the future. we've got a large team of analysts who compile a lot of data, forecasts out into the future, looking at how policy's likely to change in different countries of the world and how taxes are likely to change. the digital twin is also

helping firms map the impact climate change is already having on their operations. so, this is an example of its factories in the united states and how they might be subjected to future patterns of hurricane risk. and look at how often it's going to get disrupted, the cost to the business of that particular thing. and then, a company can then start to make changes in the laboratories here. they can work on a new product, put it into the programme and find out if it will make a difference? exactly, yes. so, that's where we're heading next. safety goggles on, as i've been given rare access to the room where the next big thing in cleaning could be on the verge of discovery, and where they're also adjusting existing product lines. we changed one of the ingredients, so it now uses lactic acid, and that's plant—based and it has a lower carbon footprint. and so, we looked at what risilience was telling us about where carbon footprints and maybe carbon tax in the future will affect us and we thought, what are the ingredients we can change? and by moving to lower carbon ingredients — things like lactic acid,

which is developed from fermenting maize — we were able to reduce the carbon footprint and that means it's set up for the future — a low—carbon, low—water economy. reckitt aren't the only ones turning to this tech. there are estimates the market for digital twins could be worth billions of dollars over the next decade. but having all the data on sustainability is one thing. companies need to act on it. i think when a lot of people hear about big companies and sustainability, they probably roll their eyes because big companies are out to make money. what is the balance there between being more sustainable and still bringing pounds in? well, the key here is how we can decarbonise and still grow. so, if we can achieve our ambition to be net zero by 20110, we can grow as well, and that decouples those two — those two topics. it could be years before we know if the decisions companies are making now will really help the planet. this tech is making that

a little bit less of a gamble. that was alasdair. now it is time for a look at this week's tech news. google has agreed to pay $400 billion to settle a privacy case. it had been accused by a0 american states of misleading users into believing location tracking was switched off. the search engine it says the claim was based on policies that changed years ago. uber says it expects people to keep using it even as their budgets get squeezed. the firm is branching out to let users book trains and buses in the app but it also told us that more drivers havejoined them. four berber market, we could serve — four berber market, we could serve the _ four berber market, we could serve the needs of the customers who decided no longer have their— customers who decided no longer have their own carpet use live instead — have their own carpet use live instead and in tough economic times— instead and in tough economic times that makes economic

sense _ times that makes economic sense. ., ., y sense. food delivery firm deliveroo _ sense. food delivery firm deliveroo says _ sense. food delivery firm deliveroo says that - sense. food delivery firm deliveroo says that is - sense. food delivery firm - deliveroo says that is quitting australia because of tough economic conditions. the country's government has been putting pressure on companies to improve gig workers' conditions. animal crossing's first e—cycling centre! to help people reduce waste, intel is showing us how to recycle old technology. the firm says electronic waste is rising three times faster than the world's population. the steam train — first built in 180a, it made rail travel cheap and suddenly everything seemed much closer to home. industry rolled on, and by the 1960s electric and diesel trains had replaced steam. today, around the world, most high—speed trains are powered by electricity.

at the historic bo'ness and kinneil railway, engineers have also moved on from the past and into technologies of the future, where they are working towards cleaner rail travel. and this — this is the little train that could be powered by hydrogen. the train itself is not new. instead, this is where old technology meets new, and a test of where hydrogen power might be a viable option on our railways. the technology beneath my feet is relatively new for the railway, but one of the interesting things about this project is that this train is actually quite old, built in 1979. it has been retrofitted to run on hydrogen. so, what was a class 314 headed for the scrapheap is now a class 614 hydrogen—powered train. the hydrogen is stored in tanks underneath the carriages along with the hydrogen fuel cell

which converts the hydrogen back to electricity which powers the train. all that is emitted is steam and water. the hydrogen needed to power the train is made on site. electricity from renewable sources is used to split water, creating hydrogen. that is then compressed, compressed again, and then stored, ready for refuelling the train. but if most of the uk rail network is electrified, what part will hydrogen play? some commentators say that hydrogen is actually a bit of a distraction and what we should be focusing on is fully electrifying our railway lines. if you have a route where you cannot do overhead electrification and the route is too long or too demanding or there is not time to charge, then the hydrogen train fills that gap.

you can get a range approaching diesel, you can refuel very quickly, and you can transport hydrogen multiple ways. so the hydrogen train fulfils some operational requirements you can't meet with other approaches. it's not the only area of transport looking to use this element. aberdeen is a city built on oil and gas, but it's now home to the first hydrogen—powered double—decker buses in the world. how does this work? what we have, watch your head, in total more than 25 kilograms of hydrogen. they will pump the hydrogen to the fuel cell down here, it mixes with fresh air and then in the process, we end up getting electricity that comes out. this electricity gets sent into a battery and from there, goes to the battery controller just the same as an electric vehicle. to get these clean and green buses up and running, hydrogen refuelling stations were set up around aberdeen. it's just like filling the bus with diesel.

instead, the pumps are stocked with hydrogen. when do you think diesel is consigned to the garages of history and the majority of your fleet are running on renewable products? 5—10 years, definitely. certainly, as a group, we will not buy any more diesel buses in the future. it will be electric or gas or hydrogen buses. thank you, driver. but it's notjust buses looking to hydrogen as a fuel of the future. this is the first—of—its—kind, zero—emission hydrogen—electric hgv which runs off renewable electricity. and like the hydrogen buses, water is its only waste. in the hgv sector, we're seeing hydrogen is the only technology that is able to give the long range, the heavy payloads and quick refuelling time. if you think about what we currently do, which is we drive around with flammable liquid in our cars with small

explosions going on around our knees and a tank of flammable liquid behind us, hydrogen is much safer because these tanks are very solid, they have triple—layer carbon fibre reinforced. so there is a place for hydrogen in transport. if we continue at our current rate, scientists estimate our fossil fuels will be burned out by 2060. we know that the way we travel must change and we can no longer rely on nonrenewable energy sources to fuel our way of life. with hydrogen and electric hybrids set to be the future, clean solutions are here to stay. that was laura. in my coat! i noticed that, actually. we've got a uniform now. did i miss the memo? talking of clothing, we have spoken in the past about problems with fast fashion. these are clothes that are so cheap, they kind of feel disposable. we've seen new ways of being

able to recycle fabrics, but this week we are taking a look at a problem that i for one didn't even know existed. luckily, shiona mccallum has found the solution. we know that fashion hurts the earth. more than 92 million tonnes of textile waste is created every year. recycling is possible but chemical dyes and prints often prevent this. if you are anything like me and buy merchandise every time you go to a gig, you may have loads of band t—shirts but sometimes your tastes do change and you are stuck with these logos forever. 0ne team here in gothenburg are trying to change that. the idea is that they print the t—shirts, strip them back and reprint them so they can be used again, again and again. the start—up isn't changing traditional fabric inks. instead, it has developed an invisible layer that goes onto the fabric first. made from entirely

friendly ingredients. this can be dissolved later, allowing the top design to be removed. what is the tech that goes into creating this recipe? it is all about a balance and trying to find the sweet spot for both the functionality but as well as stability. we look at the charge of the component, we study the films that recreate through a microscope, as well as the textiles that we are applying the print to. is there any waste product here? we create the volume for what we are trying. the mix is applied at an industrial partner where it is easily brought into the screen printing process. hello, welcome to sweden and gothenburg! thank you so much! i think you have a surprise in store for me? yes, i do. today we are going to print

a click band t—shirt. i am excited to see how it works. let's get started. the final result is here. i love it. how could i ever want this to be removed? use it as long as possible and then remove it. just for you guys, i will take this t—shirt back to the lab and see if the technology can completely remove the logo. right now, this means putting the t—shirt in a bowl with the removal chemical. it is then treated at high temperatures and left for about an hour. afterwards, there is a secret technique in getting the print to physically come off, and it should get better as the recipe and the process is fine tuned. we have some traces left.

the click band logo has gone and i can only see speckles of pink. a pretty good job. i reckon you could print on top of that and you would not notice. this would be good for recycling? that's definitely good for recycling. which is the main point, so it won't end up in landfill along with traditionally inked—up garments. another test processed more precisely without the delays of us messing about and filming has come up even cleaner. you can get it more or less completely off? we are 100% sure of that. wearers are not expected to strip their own t—shirts at home. the printing companies use our technology, people get to get the print and textile, and then we take it back. with several large european partners already developing their own garments, there is clearly an appetite for closing this circle. with more than 100 billion items made each year, it has never been more

important to make all textiles recycla ble. i did keep one of these just for my next gig, though. shiona there. that is it for this look at some of the latest innovations that are hoping to tackle climate change. it will take much more than those to make a dent on rising global temperatures, but when we see something that we think is promising, we will make sure you see it as well. thanks for watching. we will see you soon. bye— bye. hello. more wind and rain coming to just about all on tuesday. the dry days have been very hard to find for some of late. take 0diham in hampshire. this is where we saw the driest conditions during the summer.

46 days without rain in the last 24 — only two have been completely dry and only two in the last 38 — culdrose in cornwall. wet is relative to average so far this month though has been bala in gwyneth, and i reckon by the end of tuesday we'll have seen an entire month's worth of rainfall in the first 10 days. and that's because here and across north west england is where we see the wettest weather on tuesday, the greatest impacts, risk of flooding up to 100 millimetres on the hills. all responsible is this weather system which has been working its way in from the west overnight. northern eastern areas are dry enough starts, even a bit of a chill about with a touch of frost for one or two and some morning sunshine in northern scotland. but the morning rush hour in western england, wales and northern ireland will be thoroughly wet and increasingly windy. by the end of the rush hour that rain into eastern england, central and southern scotland snow in the hills, rain continues to push its way northwards. the rain does ease off, though. it does turn dry for a time

across england and wales, a little bit brighter in one or two spots, some drizzle on the hills. there's another batch of rain coming in from the west later. as i said, it turns windy, 40, maybe 50—mile gusts possible. but coming in from a south south—westerly direction, a very mild day for this stage injanuary, 10—14 celsius for many especially, we get some brighter breaks briefly across the south. so here's that slice of milder weather. it's contained between the heavy rain in the morning and a batch of not quite as heavy rain spreading eastwards during the first part of tuesday night. into wednesday, that allows westerly winds back, strengthening but bringing in the blue colours here, an indication of cooler air. now, it will be a sunny start to wednesday across some central and eastern parts. one or two staying dry, but plenty of showers already in the west, strengthening winds, touching gale force at times. and that will drive those showers, heavy with hail and thunder, eastwards as we go into the afternoon. temperatures down on tuesdays, still a degree or so higher than we normally expect for this stage injanuary. cool night will follow across the north where with lighter winds, a touch of frost. but in the south, the next weather system will bring outbreaks of rain. most persistent southern counties of england and wales, gale force winds here, bright enough start further northwards and eastwards,

but showers get going and spread to many areas before the day is out and it will feel chilly in the north, especially in those strengthening winds once again. take care.

welcome to bbc news — i'm monika plaha. our top stories: pro—democracy rallies take place across brazil in response to sunday's violent attack on government buildings by a far—right mob. there have been mass arrests following the violence by supporters of the ousted presidentjair bolsonaro. his successor, lula, has described it as a terrorist attack. a uk space mission launched from a modified plane ends in failure after a technical issue stops a rocket reaching orbit. good news for the ozone layer — a un report says action taken to save it appears to have worked. prince harry's much anticipated memoir, spare, hits bookshops

in the uk and north america on tuesday, but is already out in singapore.